Foil lined bag



Nov. l, 1932. T. M. AVERY FOIL LINED BAG Filed July 1, 1931 Hmm HM INVENTOR BY I ATTORNEY atented ov.. l, i932 l" s straff? liti TRU M. AVERY, GLENS FALLS, NEW YORK, ASSIGNOR TO UNION :BAG & PAPER CORPORATION, OF HUDSON FALLS, NEW YORK, A CORPORATION OF NEW JERSEY FOIL LINEJD :BAG

application mea my 1, 1931. serial No. 548,177.

The present invention relates to improve- Vments in bags and similar receptacles such as those employed for the packaging of various materials, and more especially to those composed of an outside sheet of paper or the like lined with metal foil or other air and moisture proof material andhaving a bottom or other portion thereof closed by flaps which are folded and pasted together.

The primary object is to provide `,novel means whereby the closing iaps of the bag or receptacle may be effectively pasted and thus securely held together notwithstanding the interposition of the liner of foil or other substance which is diflicult to paste or cement7 especially when the foil or liner is provided with a waxed backing sheet.

In the accompanying drawing:- v

Fig. l is a perspective View, partly broken away, of a foil lined bag embodying the present invention; i

Fig. 2 is abottom view of the bag showing a pair of the bottom flaps unfolded and the parts of one of these flaps separated;

Fig. 3 is a View similar to Fig. 2 but showing one of the flaps in unfolded position;

Fig. 4 is a section on an enlarged scale, taken through the bottom of the bag on the line 4.-4 of Fig. l; and

Fig. 5 is a detail fragmentary section through one of the iiaps, taken on the line closed by a, pair of inside apsbwhich are* folded inwardly from two ofthe opposite edges of the bag and by a pair of outside iapsc 5 5 of Fig. a

The invention is shown in the present instance applied to a foil lined bag which is composed of an outside sheet l of ordinary fiber paper such `as that commonly used in the making of kpaper bags, a sheet of tin or other metal foil 2 andan inner waxed paper backing sheet 3, all of which are thin and flexible, the outside sheet and the foil and its backing sheet being coextensive in area and pasted to one another and formed into a bag which, in the example shown, is of the so'- called automatictype having pleats or folds 4: in its opposite edges whichenable the front and back ofthe bag to fold'flatwise against one anotherkand the bott m of the baglis 6 and 7 which are folded inwardly from the other opposite edges of the bag onto the previously folded inside flaps 5 to which they are pasted, the flap 7 being folded against the outside of the flap 6.

Foil obtainable from foil manufacturers is usually furnished with the foil 2 stuck to the waxed backing sheet 3, but in attempting to use such foil in the manufacture of foil lined bags it has been found that the outermost flap of the bottoni of the bag could not be firmly secured in its folded position by the usual pasting, due to the fact that thewaxcd backing sheet does not stick to the metal foil suiiciently to hold the outermost Hap in folded position by pasting in the usual way. While the portion of the waxed backing sheet on the inner side of the outermost flap was pasted to the underlying flap or flaps and the outside paper sheet and foil on .this flap werepasted or cemented together, this Hap was subject to detachment and unfolding, due to the easy separation of the foil portion of this Hap from the waxed backing sheet portion there- The 'present invention enables the outside flaps to be securely pasted together by pasting together directly the portions of the outside iiaps which are composed of theioutsidel paper sheet. In the bag shown in the present instance, this is accomplished by cutting through a portion of the foil 2 and its back# ing sheet 3 on the outermost flap 7 to form a tongue 8 which is folded or doubled against the outer side of the foil and between the foil and the outside paper" sheet 1, thus providing a slot or opening 9 which extends through the foil 2`and backing sheet 3 and exposes the inner side of the outside paper sheet l, the foil beyond the slot or toward the free end o`f this flap being pasted to theI outside paper sheet vl, and when 4:the outside flap 7 is folded against the flap 6, after a line of paste or other suitable adhesive l0 has been applied to the outsides of the flaps 5 and the inside of the flap 7 andv across the area of the outside paper sheet l exposed through the slotforopening 9 Iin the. latter flap, the area of the outside paper sheet 1 exposed through the slot or opening 9lis pressed into Contact with the titiy outside paper sheet on the outside of the flap 6, a portion of the tia-p 6 being,-if necessary, pressed through the slot' 9 as shown in Fig. 4, whereby the flaps 6 and 7 are secured together firmly and securely by thel direct pasting t0- gether of the contacting portions of the outside paper sheet 1. The outside flaps of the lbag are thus securely pasted together notlo, withstanding the insuiiicient sticking of the foil to the waxed backing sheet.`

Such direct pasting together of the fiber paper sheets of the outside'iiaps 6 and 7 se-,

curely holds these flaps in folded position, and the line of paste 10 willisuiiciently at-I tach the outside flaps to the inside iiaps 5 to close the bag bottom against leakage, the secure uniting of the outside flaps in the manlner described effectively preventing pulling understood by those skilled in the art.

It will be understood that ,the invention is c applicable also to bags or other receptacles having 'a liner composed of other air and moisture proof material which is difficult to paste or cement, such for example as Cellophane or any of the other well-knownthinl transparent, iiexible sheet cellulose products obtained. from viscose.

The provision of the slot or perforation 9l enables the outermost ilapto be securely pasted to the underlying flap by thedirect contact and pasting together of the ordinary or fiber paper portions of these flaps as hereinbefore described, the folding of the tongue 8 into position between the foil portion and the outer liber paper portion of this flap .avoiding the necessity of removing entirelyL the portions of the foil and its backing sheet which are cut to form the slot or perforation.

by example as applied to a bag of one wellknown typeit will be understood that the invention is applicable to bags of other types having flaps for closing the bottom thereof and may also be applied to receptacles or containers of other kinds having flaps for closing or securing portions thereof.

I claim as my invention 1. A bag or receptacle comprising an cutside sheet anda liner and backing sheet therefor portions of which sheet and liner form iaps one of which is folded against the other, the portions of the liner and its backing'sheet on one flap and which lie between the folded flaps being perforated to expose a portion of the outside sheet of the respective iap to the outside sheet of the other flap for pasting thereto. '2.' A bag or receptacle comprising an outside sheet composed of fiber paper and a foil liner having a waxed paper backing sheet at its inner side, portions of said sheets and liner forming iiaps which are folded, one against another, the portions of the liner and backing sheet on one flap having an' opening therein which exposes the outside sheet of said fla-p to the outside sheet of the other flap and through which opening said outside sheets of the flaps are pasted together.

3. A bag or receptacle comprising an putside sheet composed of paper and a foil hner having an inside waxed backingsheet, portions of said sheets and liner forming flaps which are folded, one against the other, the portions of the foil liner and backing sheet on one of the flaps having a tongue cut therefrom and folded between said portions of the liner and backing sheet and the portion of the outside sheet on saidliap, leaving an opening insaid portions of the liner and backing sheet through which the portions of the outside sheet on the flaps are exposed to each other and pasted together.

In Vtestimony whereof I have hereunto set my hand.'

. l TRUE M. AVERY.

While the invention is shown and described 5 

